True! because if you have more than one variable, you aren’t going to know which variable changed the dependent variable.
A focus group is an interview conducted by a trained moderator among a small group of respondents in an unstructured and natural manner.
Answer:
The nitrogenous bases guanine and adenine are A. purines.
Explanation:
Adenine and guanine are purines, whereas the other two bases in DNA (thymine and cytosine) are pyrimidines. The main difference between purines and pyrimidines is the number of rings that the base has: purines have two rings while pyrimidines only have one ring.
In addition, phosphate group and sugar group cannot be the answer to this question because these two elements in addition to a nitrogenous base makes up a nucleotide.
Hope this helps!
I think <span>climate change</span>
